Does this tractor really suit you and your needs? Do you fit OK on it for example?
4 years ago I paid $7900 for my 1602D 4X4 (Red, 83 or 84 model), with FEL, Box Blade, tiller and 4' brush hog. The hour meter showed 74 hours, which I did not believe to be accurate (unless it was 1074). It was in good shape, needing only some of the usual maint (oil change, air filter, fuel filter, fan belt, etc) and has worked for me without fail ever since.....I would not worry about the parts, they're easy to get and reasonably priced, I'd simply make sure this is the right tractor for the work you want to do....and of course, that it's in good condition now. Have you started it, driven it, operated the lifts and such?